Tag: nimh

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Solar panels for sensor nodes

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Intro For a while now, I started replacing the dead AA(A) batteries in my sensor nodes with rechargeable NiMH ones. So, since these batteries are rechargeable, I thought, why not trying adding small solar panels for sensor nodes, where light is abundant. Node 27: outside sensor Purpose: outside temperature, humidity, light, pressure sensor. Powered by 2 x AAA 500mAh from Ikea. The solar cell is rated 3V, 125mA and is pointing vertically south and costs… Continue reading

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Simple LED strip UPS

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Why? There are multiple LED strips in my home, all of them automated and remote controlled, as part of my home automation system. LED strips are very flexible, both literally and as usage case, easy to control and provide an interesting lighting option. While there are issues with electricity at most once or twice a year, I thought about how it might be good if some of these LED lights might work for a while once… Continue reading

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An odd torch – Energizer Pivot

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Intro I have used 2 types of LED torches: regulated and unregulated. The unregulated ones are the most common and they use some simple circuits for the LEDs, which means that as the battery discharges the light output gets lower. The regulated ones use some circuit to maintain a constant current flow as the battery discharges, for as much as possible. What about the Energizer hard case pro pivot plus? This is an odd one.… Continue reading